Husqvarna 445, 445e, 450e manual Cutting equipment, General Safety Precautions, General rules

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Cutting equipment

GENERAL SAFETY PRECAUTIONS

Cutting equipment

This section describes how to choose and maintain your cutting equipment in order to:

•Reduce the risk of kickback.

•Reduce the risk of the saw chain breaking or jumping off the bar.

•Obtain optimal cutting performance.

•Extend the life of cutting equipment.

•Avoid increasing vibration levels.

General rules

•Only use cutting equipment recommended by us! See instructions under the heading Technical data.

•Keep the chain’s cutting teeth properly sharpened! Follow our instructions and use the recommended file gauge. A damaged or badly sharpened chain increases the risk of accidents.

•Maintain the correct depth gauge setting! Follow our instructions and use the recommended depth gauge clearance. Too large a clearance increases the risk of kickback.

•Keep the chain properly tensioned! If the chain is slack it is more likely to jump off and lead to increased wear on the bar, chain and drive sprocket.

•Keep cutting equipment well lubricated and properly maintained! A poorly lubricated chain is more likely to break and lead to increased wear on the bar, chain and drive sprocket.

Cutting equipment designed to reduce kickback

WARNING! Faulty cutting equipment or ! the wrong combination of bar and saw

chain increases the risk of kickback! Only use the bar/saw chain combinations we recommend, and follow the filing instructions. See instructions under the heading Technical data.

The only way to avoid kickback is to make sure that the kickback zone of the bar never touches anything.

By using cutting equipment with ”built-in” kickback reduction and keeping the chain sharp and well- maintained you can reduce the effects of kickback.

Bar

The smaller the tip radius the lower the chance of kickback.

Chain

A chain is made up of a number of links, which are available in standard and low-kickback versions.

IMPORTANT! No saw chain design eliminates the danger of kickback.

WARNING! Any contact with a rotating ! saw chain can cause extremely serious

injuries.

Some terms that describe the bar and chain

To maintain the safety features of the cutting equipment, you should replace a worn or damaged bar or chain with a bar and chain combinations recommended by Husqvarna. See instructions under the heading Technical Data for a list of replacement bar and chain combinations we recommend.

Bar

•Length (inches/cm)

•Number of teeth on bar tip sprocket (T).

•Chain pitch (inches). The spacing between the drive links of the chain must match the spacing of the teeth on the bar tip sprocket and drive sprocket.

115 10 81-26 Rev.2 2008-01-11

English – 11

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Contents 445 445e 450e Operator′s manualSymbols in the operator’s manual KEY TO SYMBOLSSymbols on the machine Contents CONTENTSDear Customer INTRODUCTIONWhat is what on the chain saw? WHAT IS WHAT?Before using a new chain saw GENERAL SAFETY PRECAUTIONSChain brake and front hand guard Machine′s safety equipmentAlways use common sense Personal protective equipment8 – English Throttle lockout Muffler Stop switchRight hand guard Vibration damping systemCutting equipment designed to reduce kickback Cutting equipmentGeneral rules increases the risk of kickback General information on sharpening cutting teethWARNING! Departure from the sharpening instructions considerablyTensioning the chain General advice on adjusting depth gauge settingincreased if the depth gauge setting is Adjustment of depth gauge setting445e, 450e Filling with chain oil Lubricating cutting equipmentwhich could lead to serious, even fatal injuries Chain oilChain drive sprocket Fitting the bar and chain ASSEMBLYFitting a spike bumper Fuel FUEL HANDLINGLong-termstorage Fuel safetyFuelling Transport and storageStarting and stopping STARTING AND STOPPINGStopping General working instructions WORKING TECHNIQUESBefore use 24 – English Basic cutting technique Tree felling technique 12 3Directional cuts Felling directionClearing the trunk and preparing your retreat FellingFelling cut Freeing a tree that has fallen badly How to avoid kickbackWhat is kickback? Limbing WARNING! A majority of kickback General MAINTENANCECarburettor adjustment immediately Checking the inertia brake releaseChecking the brake trigger Muffler Tensioning the recoil spring StarterReplacing the starter cord Fitting the starter Air filterReplacing the return and drive springs Cooling system Spark plugLubricating the bar tip sprocket Needle bearing lubricationTemperature -5Cor colder ”Air Injection” centrifugal cleaningWinter use Monthly maintenance Maintenance scheduleDaily maintenance Weekly maintenanceTechnical data TECHNICAL DATAPitch, inch Bar and chain combinationsSaw chain filing and file gauges Length, inchApplies to Europe only EC-declarationof conformity´z+S,¶6c¨ ´z+S,¶6c¨ Page 1151081-26 ´z+S,¶6c¨ ´z+S,¶6c¨
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